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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, percentage of outstanding stock maximum 5.00%  
Share-based compensation arrangement by share-based payment award, percentage of outstanding and available for grant, maximum 10.00%  
Compensation expense, share-based payment plans $ 745 $ 753
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Volatility rate 9.70% 9.90%
Risk-free interest rate 0.60% 2.50%
Expected dividend yield 0.40% 0.70%
Expected life of awards (years) 6 years 2 months 12 days 7 years 4 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Exercisable, ending balance 936,457  
Stock option plans [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense, share-based payment plans $ 126 $ 149
Stock options awarded, term (years) 10 years  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding, beginning balance 1,428,082  
Granted 28,397  
Exercised 0  
Forfeited (7,335)  
Outstanding, ending balance 1,449,144  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Outstanding, weighted average exercise price, beginning balance $ 15.13  
Granted, weighted average exercise price 24.20  
Exercised, weighted average exercise price 0  
Forfeited, weighted average exercise price 15.34  
Outstanding, weighted average exercise price, ending balance 15.30  
Exercisable, weighted average exercise price, ending balance $ 13.43  
Outstanding, weighted average remaining contractual life (years) 5 years 6 months  
Exercisable, weighted average remaining contractual life (years) 4 years 3 months 18 days  
Outstanding, aggregate intrinsic value $ 12,897  
Exercisable, aggregate intrinsic value 10,082  
Outstanding, unrecognized compensation cost $ 1,286  
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition 3 years 3 months 18 days  
Stock-settled stock appreciation rights (SSARs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense, share-based payment plans $ 61 95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]    
Unvested, beginning balance 262,705  
Granted 0  
Forfeited (2,254)  
Vested (113,757)  
Unvested, ending balance 146,694  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Unvested, weighted average award date value, beginning balance $ 3.47  
Granted, weighted average award date value 0  
Forfeited, weighted average award date value 3.53  
Vested, weighted average award date value 3.31  
Unvested, weighted average award date value, ending balance $ 3.59  
Weighted average remaining contractual life (years) 1 year 7 months 6 days  
Unrecognized compensation cost $ 462  
Aggregate intrinsic value 3,550  
Restricted stock units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense, share-based payment plans $ 216 233
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]    
Unvested, beginning balance 224,259  
Granted 86,959  
Forfeited (1,871)  
Vested (49,518)  
Unvested, ending balance 259,829  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Unvested, weighted average award date value, beginning balance $ 17.11  
Granted, weighted average award date value 23.72  
Forfeited, weighted average award date value 17.37  
Vested, weighted average award date value 14.54  
Unvested, weighted average award date value, ending balance $ 19.81  
Weighted average remaining contractual life (years) 3 years  
Unrecognized compensation cost $ 3,444  
Aggregate intrinsic value $ 6,288  
Employee PRSUs [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]    
Granted 86,959  
Unvested, ending balance 228,407  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Unvested, weighted average award date value, ending balance $ 19.92  
Weighted average remaining contractual life (years) 3 years 6 months  
Unrecognized compensation cost $ 3,176  
Aggregate intrinsic value $ 5,528  
Nonemployee Director RSUs [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]    
Unvested, ending balance 31,422  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Unvested, weighted average award date value, ending balance $ 19.01  
Weighted average remaining contractual life (years) 1 year 1 month 6 days  
Unrecognized compensation cost $ 268  
Aggregate intrinsic value 760  
The Davey Employee Stock Purchase Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense, share-based payment plans $ 342 $ 276
Employee stock purchase plan, service period 1 year  
Employee stock purchase plan, percentage of market price, purchase date 85.00%  
Employee stock purchase plan, discount from market price, purchase date 15.00%